Composite ball with high wear resistance and waterproofness

ABSTRACT

The present invention provides a composite ball with high wear resistance and waterproofness, which comprises a bladder layer, an attached sheet layer, and a protective layer, the bladder layer comprises a solid ball filled with an elastic material, the attached sheet layer comprises an upper attached sheet layer and a lower attached sheet layer, and the attached external surfaces of the upper attached sheet layer and the lower attached sheet layer are also covered by the protective layer which is molded by injecting the elastic material. As the present invention adopts the injection molding method to form the protective layer on the surface of the attached sheet layer, the present invention has special waterproof and wear-resisting properties in comparison with conventional balls.

BACKGROUND OF THE INVENTION

The present invention relates to the field of sports goods, and inparticular to a composite ball with high wear resistance andwaterproofness.

At present, ball games have the reputation of “the No. 1 sport in theworld”, and are individual sports with highest influence on the globalsports circles.

In the prior art, leather is adopted normally to produce ball products.Although leather has certain wear resistance, in a high-intensity gameor a court game with poor environment, the surface strength of leatherballs cannot meet use requirements, and the wear speed of balls is high.Moreover, as conventional balls are usually formed by directly splicingor sewing multiple ball pieces on a bladder, the process is complex,waterproofness is poor, and the ball pieces are easy to break and shedafter repeated use, affecting the service life. Now, a composite ballwith high wear resistance and waterproofness which can solve the aboveproblems is needed.

BRIEF SUMMARY OF THE INVENTION

The present invention provides a composite ball with high wearresistance and waterproofness, which solves the problem thatconventional balls in use are easy to wear by technically alteringconventional ball structures.

In order to solve the above technical problem, the present inventionspecifically adopts the following technical solution: a composite ballwith high wear resistance and waterproofness, comprising: a bladderlayer, an attached sheet layer, and a protective layer, wherein thebladder layer comprises a solid ball filled with an elastic material,the attached sheet layer comprises an upper attached sheet layer and alower attached sheet layer, the attached external surfaces of the upperattached sheet layer and the lower attached sheet layer are also coveredby the protective layer which is molded by injecting the elasticmaterial, the upper attached sheet layer and the lower attached sheetlayer can wrap the exterior of the bladder layer and be spliced togetherto form a complete ball, and a viscous material is arranged at the jointbetween the upper attached sheet layer and the lower attached sheetlayer, so that the upper attached sheet layer and the lower attachedsheet layer are tightly stuck together.

Compared with the prior art, the present invention has the followingbeneficial effects: the present invention adopts a thermoplastic elasticmaterial as the external protective layer, the whole of the ball isformed by injection molding on the exterior of the attached sheet layerand adopting the method of sticking the upper attached sheet layer andthe lower attached sheet layer together, so the integrity is high;because of the in-mold injection molding method, molding in a circularmold can achieve an effect closer to a true circle, and an assemblymethod using a small number of pieces is adopted which is different fromthe traditional multi-piece assembly, thus a rapid assembly can berealized; moreover, as the present invention adopts the injectionmolding method for the first time to form the protective layer on thesurface of the attached sheet layer, the protective layer has theproperties of waterproofness, wear resistance and easiness in formation,so that the present invention has special waterproof and wear-resistingproperties in comparison with conventional balls; and the productionprocess is optimized, so that production is quicker and more efficient.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic diagram of the present invention;

FIG. 2 and FIG. 3 are schematic diagrams of the splicing of an upperattached sheet layer and a lower attached sheet layer of the presentinvention;

FIG. 4 is a schematic diagram of a sheet layer of the present invention;and

FIG. 5 is a schematic diagram of convex portions and concave portions ofthe present invention.

Description of reference numerals: bladder layer 1, attached sheet layer2, protective layer 3, reinforcing layer 4, upper attached sheet layer21, lower attached sheet layer 22, convex portion 5 and concave portion6.

DETAILED DESCRIPTION OF THE INVENTION

The specific content of the present invention will be described indetail below in reference to FIGS. 1-5 and embodiments.

As shown in FIGS. 1-5, the present embodiment provides a composite ballwith high wear resistance and waterproofness, comprising: a bladderlayer 1, an attached sheet layer 2, and a protective layer 3, whereinthe bladder layer 1 comprises a solid ball filled with an elasticmaterial, the attached sheet layer 2 comprises an upper attached sheetlayer 21 and a lower attached sheet layer 22, the attached externalsurfaces of the upper attached sheet layer 21 and the lower attachedsheet layer 22 are also covered by the protective layer 3 which ismolded by injecting the elastic material, the upper attached sheet layer21 and the lower attached sheet layer 22 can wrap the exterior of thebladder layer 1 and be spliced to form a complete ball, and a viscousmaterial is arranged at the joint between the upper attached sheet layer21 and the lower attached sheet layer 22, so that the upper attachedsheet layer 21 and the lower attached sheet layer 22 are tightly stucktogether.

A ball preparation process of the present embodiment is as follows:

(a) a leather material which has been attached is printed, and theleather material is then cut into ball pieces;

(b) the ball pieces are attached onto a semispherical mold and stuck toform the semispherical attached sheet layer 2;

(c) the semispherical mold and the semispherical attached sheet layer 2are put into an injection molding machine to undergo injection molding,so that a uniform rubber layer is formed on the external surface of thesemispherical attached sheet layer 2, and thus the upper attached sheetlayer 21 and the lower attached sheet layer 22 are produced; and

(b) the upper attached sheet layer 21 and the lower attached sheet layer22 wrap the bladder layer 1, pressed to be spliced and then glued, sothat the desired composite ball is produced ultimately.

In order to achieve the wear-resisting property of the protective layer3, TPU, TPR, PU, TR, SBS or the like is adopted generally as the elasticmaterial, the present embodiment adopts thermoplastic polyurethaneelastomer, TPU for short, TPU has the outstanding characteristics ofexcellent wear resistance, excellent ozone resistance, high hardness,high strength, good elasticity, low temperature resistance, good waterand oil resistance, chemical resistance and environment resistance, andmoreover, TPU has high transparency and finish, and does not affect thevisual effect of printing when being injected onto the external surfaceof the attached sheet layer 2.

In order to ensure that the upper attached sheet layer 21 and the lowerattached sheet layer 22 can be spliced tightly and cannot separateeasily after being stuck, the joint between the upper attached sheetlayer 21 and the lower attached sheet layer 22 is sawtoothed, moreover,the edge of each of the upper attached sheet layer 21 and the lowerattached sheet layer 22 is provided with convex portions 5 and concaveportions 6, each convex portion 5 is adjacent to one concave portion 6,each convex portion 5 or concave portion 6 of the upper attached sheetlayer 21 corresponds to each convex portion 5 or concave portion 6 ofthe lower attached sheet layer 22, so that the upper attached sheetlayer 21 and the lower attached sheet layer 22 can be embedded with eachother. After being embedded, sticking is carried out, so that the upperattached sheet layer 21 and the lower attached sheet layer 22 can betightly stuck together and cannot separate easily.

In order to enhance the durability of balls, a reinforcing layer 4 isalso arranged between the bladder layer 1 and the attached sheet layer2, and the reinforcing layer 4 is wound outside the bladder layer 1using a weaving thread, a woven fabric or a non-woven fabric to form areinforcing sheet layer. The nylon net of the weaving thread, wovenfabric or non-woven fabric enhances the roundness and elastic strengthof balls.

In order to achieve a better effect in use, the viscous material iswaterproof sealant. The waterproof sealant can effectively preventrainwater from entering via the splicing seal between the upper attachedsheet layer 21 and the lower attached sheet layer 22, preventing theattached sheet layer 2 and the bladder layer 1 from being soaked anddamaged by rainwater, and making the ball have better waterproofproperty.

The present invention adopts TPU as the external protective layer 3, thewhole of the ball is formed by injection molding on the exterior of theattached sheet layer 2 and adopting the method of sticking the upperattached sheet layer 21 and the lower attached sheet layer 22 together,so the integrity is high; moreover, as the present invention adopts theinjection molding method for the first time to form the protective layer3 on the surface of the attached sheet layer 2, the protective layer 3has the properties of waterproofness, wear resistance and easiness information, so that the present invention has special waterproof andwear-resisting properties in comparison with conventional balls; and theproduction process is optimized, so that production is quicker and moreefficient.

Finally, it should be explained that the above embodiment are merelyintended to illustrate rather than limit the technical solution of thepresent invention. Although the present invention is illustrated indetail in reference to the preferred embodiment, it should be understoodby those with ordinary skill in the art that modification or equivalentreplacement can be made on the technical solution of the presentinvention without departing the purpose and scope of the technicalsolution of the present invention, and should all fall into the scope ofthe claim of the present invention.

What is claimed is:
 1. A composite ball with high wear resistance andwaterproofness, characterized by comprising a bladder layer, an attachedsheet layer, and a protective layer, wherein the bladder layer comprisesa solid ball filled with an elastic material, the attached sheet layercomprises an upper attached sheet layer and a lower attached sheetlayer, the attached external surfaces of the upper attached sheet layerand the lower attached sheet layer are also covered by the protectivelayer which is molded by injecting the elastic material, the upperattached sheet layer and the lower attached sheet layer can wrap theexterior of the bladder layer and be spliced together to form a completeball, and a viscous material is arranged at the joint between the upperattached sheet layer and the lower attached sheet layer, so that theupper attached sheet layer and the lower attached sheet layer aretightly stuck together.
 2. The composite ball with high wear resistanceand waterproofness according to claim 1, characterized in that theelastic material is a macromolecular thermoplastic elastic material. 3.The composite ball with high wear resistance and waterproofnessaccording to claim 1, characterized in that the joint between the upperattached sheet layer and the lower attached sheet layer is sawtoothed,moreover, the edge of each of the upper attached sheet layer and thelower attached sheet layer is provided with convex portions and concaveportions, each convex portion is adjacent to one concave portion, andeach convex portion or concave portion of the upper attached sheet layercorresponds to each convex portion or concave portion of the lowerattached sheet layer, so that the upper attached sheet layer and thelower attached sheet layer can be embedded with each other.
 4. Thecomposite ball with high wear resistance and waterproofness according toclaim 1, characterized in that a reinforcing layer is also arrangedbetween the bladder layer and the attached sheet layer, and thereinforcing layer is wound outside the bladder layer using a weavingthread or a woven fabric to be to form a reinforcing sheet layer.
 5. Thecomposite ball with high wear resistance and waterproofness according toclaim 1, characterized in that the viscous material is waterproofsealant.